A code replacing Nametrans redirect?

Here's some code I wrote years ago (back in the NES 3.6 or 4.1 days, though it still works fine in SJWS 6.1) to allow seamlessly remapping a URI (1:1 mapping of requested URI to handling URI) without issuing a redirect. Usage in obj.conf looks like

NameTrans fn="PW-internal-redirect" apparentPath="/" cgiPath="/apps/home.pl"

Don't worry about "cgi" in the "cgiPath" argument name -- it should work for remapping to any sort of URI. You'll need to replace strcmp() with something like shexp_cmp() in order to have a N:1 "/testfolder/*" to "/test.jsp" mapping as you discuss.

Note that by default the web server log records the first request line (method + URI + protocol/version) in the access log, and this NSAPI does not change that value. So if you remapped /testfolder/ to /test.jsp and fielded a request for /testfolder/, your access log would show something like "GET /testfolder/ HTTP/1.1" even though /test.jsp serviced the request.

To pass the original URI to /test.jsp, you'd need to add something like this to the SAF C code

param_free(pblock_remove("X-INITIAL-URI", rq->headers));

pblock_nvinsert("X-INITIAL-URI", pblock_findval("uri", rq->reqpb), rq->headers);

before resetting ppath and then you could use something like request.getHeader("x-initial-uri") in the JSP to retrieve the original URI.

See the NSAPI programmer's guide for more info if you haven't built a custom SAF before.

/* Netscape NSAPI header files */

#include "nsapi.h"

NSAPI_PUBLIC int PW_internal_redirect(pblock *pb, Session *sn, Request *rq) {

char *cgiPath;

char *apparentPath;

/* check parameters and ppath value (you could obviously change

from strcmp() to a regexp compile/comparison if needed) */

if ( ((cgiPath=pblock_findval("cgiPath",pb)) == NULL)

|| ((apparentPath=pblock_findval("apparentPath",pb)) == NULL)

|| (strcmp(apparentPath, pblock_findval("ppath", rq->vars)) != 0) )

return REQ_NOACTION;

/* looks like a match, clear the current ppath */

if ( param_free(pblock_remove("ppath", rq->vars)) ) {

/* make the httpd act as if they requested something else */

pblock_nvinsert("ppath", cgiPath, rq->vars);

}

/* and we return from the function */

return REQ_NOACTION;

}

The Makefile (Solaris, Sun Workshop compiler) looks like this:

# Defines for example NSAPI programs running under SOLARIS

CC_CMD=cc -DNET_SSL -DSOLARIS -D_REENTRANT -xchip=ultra2

LD_SHAREDCMD=ld -G -s

all:

prepare:

INCLUDEDIR=/path/to/sjwsdir/plugins/include

OBJS = PW_internal_redirect.o

INCLUDE_FLAGS=-I$(INCLUDEDIR) -I$(INCLUDEDIR)/base -I$(INCLUDEDIR)/frame

COMMON_DEFS=-DMCC_HTTPD -DXP_UNIX -DSPAPI20

all: PW_internal_redirect.so

PW_internal_redirect.so: $(OBJS)

$(LD_SHAREDCMD) $(OBJS) -o PW_internal_redirect.so $(EXTRA_LDDEFINES)

.c.o:

$(CC_CMD) $(COMMON_DEFS) $(INCLUDE_FLAGS) -c $<

clean:

rm $(OBJS) PW_internal_redirect.so $(EXTRA_CLEAN)

PeterWatkins at 2007-7-7 0:11:14 >